The only problem with the RX 480 is the PCIe power draw issue where its overdrawing the PCIe slot. AMD is going to be releasing a fix for this today, once that is released value wise you can't beat this card's performance for the price. In DX 12 it outperforms many more expensive cards, and in DX 11 it keeps right up with them.
Wait to see the results of the fix today, and then the RX 480 will be a good choice once we know this power issue is gone.